I saw this cool animation that visualizes the patterns of electrical activity as neurons fire.
After seeing this, I was reading a related article about the effort to map brain activity down to the individual neurons. This is currently being used on worms with a simpler nervous system.
With this research, and the recently launched BRAIN Initiative by the US government, we will undoubtedly see increasing knowledge about this subject in the coming years, similar to the unraveling of the genome.
The human brain continues the quest to try to understand itself...